insulin syringe calculator

THE U-100 CONVERSION TOOL

Insulin syringe calculator

Convert mg, mcg or mL to U-100 syringe markings using your known label values.

New to syringe markings?
01

Enter your label values

My label shows
mL

Confirmed final volume of the whole vial.

Why the label format matters

Total mg is the mass in the whole vial. mg/mL is its concentration. They are different inputs. This calculator does not recommend a mixing volume.

Enter the amount already specified by your prescriber. This tool does not choose it.

02 Match your syringe

All three use the U-100 scale: 100 units per mL.

Only for U-100 syringe markings. Check the scale printed on the barrel.

WORKED VOLUME EXAMPLE On your device

20 U-100 markings ÷ 100

0.20 mL

20 markings on a 0.5 mL U-100 barrel represent 0.20 mL. This is an arithmetic example, not your result or a suggested dose.

Load this volume example to edit →
Syringe view0.5 mL · U-100
05101520253035404550Front edge
← Needle end1-unit marks
Measurement close-up20 units
161718192021222324Front edge

The pointer follows the exact result. A position between lines is not a marked division.

Illustration only. Read the plunger edge nearest the needle. Check the markings on your actual syringe.

Measurement, not medical advice. Confirm your prescribed amount and how to measure it with your prescriber or pharmacist. This tool does not calculate an insulin dose or convert biological IU to mg.

No account. Calculations stay on your device.

Saved calculations 0 on this device

Stored in this browser only. Shared devices can see them. Export a backup before clearing browser data.

THE REFERENCE LIBRARY

Understand every marking.

Clear explanations, original diagrams and printable conversion tables.

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Your inputs. Transparent arithmetic.

A U-100 syringe has 100 markings per mL. How much mass each marking represents depends on the solution concentration you enter.

This calculator does not select a dose, tell you how to prepare a medicine, or convert biological IU into mass. For insulin prescribed in units, follow the prescribing and device instructions. Read the scope and limitations.

How the arithmetic is checked →